Top Quality Neodymium Iron Boron (NDFeB) Rare Earth Magnets * Nickel-Copper-Nickel 3 layer coated for maximum protection and durability * 2" long x 1" wide x 1/2" thick N42 block with taper hole, magnetized through thickness * Quantity: 1 magnet per package. Approximate pull force: over 72 lbs * 0.365" x 0.195" countersunk center hole fits with #8 metal screws on both sides